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Naslov:Quantitative in situ X-ray diffraction analysis of early hydration of belite-calcium sulfoaluminate cement at various defined temperatures
Avtorji:ID Mrak, Maruša (Avtor)
ID Lengauer, Christian L. (Avtor)
ID Dolenec, Sabina (Avtor)
Datoteke:URL URL - Izvorni URL, za dostop obiščite https://www.mdpi.com/2075-163X/11/3/297
Opis: Odprti dostop
 
.pdf PDF - Predstavitvena datoteka, prenos (4,59 MB)
MD5: D11CB7BC84165BACD2976BCE8DD750F8
 
Jezik:Angleški jezik
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:Logo ZAG - Zavod za gradbeništvo Slovenije
Povzetek:The influence of temperature on the early hydration of belite-calcium sulfoaluminate cements with two different calcium sulfate to calcium sulfoaluminate molar ratios was investigated. The phase composition and phase assemblage development of cements prepared using molar ratios of 1 and 2.5 were studied at 25, 40 and 60 ◦C by in situ X-ray powder diffraction. The Rietveld refinement method was used for quantification. The degree of hydration after 24 h was highest at ambient temperatures, but early hydration was significantly accelerated at elevated temperatures. These differences were more noticeable when we increased the temperature from 25 ◦C to 40 ◦C, than it was increased from 40 ◦C to 60 ◦C. The amount of calcium sulfate added controls the amount of the precipitated ettringite, namely, the amount of ettringite increased in the cement with a higher molar ratio. The results showed that temperature also affects full width at half maximum of ettringite peaks, which indicates a decrease in crystallite size of ettringite at elevated temperatures due to faster precipitation of ettringite. When using a calcium sulfate to calcium sulfoaluminate molar ratio of 1, higher d-values of ettringite peaks were observed at elevated temperatures, suggesting that more ions were released from the cement clinker at elevated temperatures, allowing a higher ion uptake in the ettringite structure. At a molar ratio of 2.5, less clinker is available in the cement, therefore these differences were not observed.
Ključne besede:in situ X-ray diffraction, hydration, temperature, cement, rietveld analysis
Status publikacije:Objavljeno
Verzija publikacije:Objavljena publikacija
Datum objave:11.03.2021
Založnik:MDPI AG
Leto izida:2021
Št. strani:str. 1-21
Številčenje:Vol. 11, no. 3
PID:20.500.12556/DiRROS-15853 Novo okno
UDK:620.1/.2
ISSN pri članku:2075-163X
DOI:10.3390/min11030297 Novo okno
COBISS.SI-ID:54931459 Novo okno
Avtorske pravice:© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Opomba:Nasl. z nasl. zaslona; Opis vira z dne 12. 3. 2021;
Datum objave v DiRROS:26.06.2023
Število ogledov:780
Število prenosov:441
Metapodatki:XML DC-XML DC-RDF
:
MRAK, Maruša, LENGAUER, Christian L. in DOLENEC, Sabina, 2021, Quantitative in situ X-ray diffraction analysis of early hydration of belite-calcium sulfoaluminate cement at various defined temperatures. Minerals [na spletu]. 2021. Vol. 11, no. 3, p. 1–21. [Dostopano 16 marec 2025]. DOI 10.3390/min11030297. Pridobljeno s: https://dirros.openscience.si/IzpisGradiva.php?lang=slv&id=15853
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Gradivo je del revije

Naslov:Minerals
Skrajšan naslov:Minerals
Založnik:MDPI AG
ISSN:2075-163X
COBISS.SI-ID:519985177 Novo okno

Gradivo je financirano iz projekta

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:1000-18-1502
Naslov:Young researcher program
Financer:Drugi - Drug financer ali več financerjev
Številka projekta:BI-AT/18-19-014
Naslov:Effect of clinkering process on the mineralogy of belite-sulfoaluminate cement clinker

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:in situ rentgenska difrakcija, hidratacija, temperatura, cement, rietveldova analiza


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